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3 Sheets-Sheet 1 c. uM'osHER AIR HEATING APPARATUS Original Filed August 14`. 1923 ATYO H N EY5 Re, w 1 6,53

Jan. 1l 1927. y

f CL D. MOSHER AIR HEATING APPARATUS 5 Sheets-Sheet 2 Original Filed August 14. 1923 4.45 1.14 )ya i725 ATTO R N EVS Jan. ll 1927. l C. D. MOSHER Am HEATING APnRATUs 5 Sheets-Sheet 5 Original Filed August 14, 1923 @l D' INTENTOH www@ ATTORNEYS-I Jan. 11, v1327.

- 1 UNITED ASTATES R.`16 ,ss1`l i Pari-NT-v oFFicE.

cnAnLnsn. mism, or ma rAnx, uAssAcnUsE'r'ls.

AIB-HEATnm APPARATUS. v 1

' loriginal no."1,sss,4ss, ama

made up of removable aNir chambers with.

corrugated surfaces, that provide sinuous passages for air and gases that flow through the heater in opposite directions.

; It is Well known that a gas or air will flow along a straight or plane surface and closely adhere thereto, by virtue of which .only a u thin stratum of the air or gas is heatedfrom any heat emanating from the plane surface, thesaid stratum forming an insulator of heat and permitting but little heat to be transmitted .to the other strata' of the mass of air. By means of corrugated plates,- as employed in this apparatus, a zigzag iow. of hot gases is obtained on one side of the plates and-a zigzag counter How -of air on the opposite sides of the plates.

80 The plates are contained in an 'air heater,

invwhich hot gases .iiow in one direction on one s ide of the plates, and the air to be heated fiows in the opposite direction on the vopposite sideofthe plates.

l5 The 'corrugatedsurfaces of theplates proil vide zigzag or sinuous passages which cause 'the air and hot gases to constantly change their direction of fiow at each impingement on the surfaces of the plates.

40 and hot gases as they .leave the surfaceof one 'corrugation' im'pinge against4 the sur` ,v face of the next Vcorrugation in av directionV makingzan angle vfrom its previousldirecty-ion ".ofiow.

Y. By this meanslstratication isbroken up and the amount :of lheat"-tran'sfe'ri'edf.from the hot gases to the air isfgreatly increased .per unit ofsurface. Y

The organization of the invention shown by the drawings com rises an air heater with a casing 'enclosing vetachable air chambers or units adjacent to each other in a row and having `corrugated side walls. Air y/iiows rthrouglythechambers on its way to the fuel uprights 46. The casing uhas connected 'October 87, 1925, Serial No. 657,303, med August 145-1928. reissue illedMay 29,' `1926. Serial No. 112,674.

Both the, airv Application for of afurnace, and hot vgases. and I roducts .of

.combustion from the fueliow t rough'the heater between the outer faces Aof thevcha'm? bers lin an opposite direction. HeatisA tleieby' transmitted from the hot gases to the 'air through the walls of the airfchambers.

In the accompanying drawings,-

Figure 1 represents .a slide elevation of the air-heating apparatus connected to va steam tion. Figure tion of an air heater.

Figure 3 indicates a partal section-pf Figure 2, on the line 3-3. l .fi'

Figure 4 represents al partial section of 'Figure 2, on the line 4 4.'

Figure 5 shows a right hand side view and section on the 'line 5 5 of Figure 2.

Figure. 6 represents a fragmentary enlarged side elevation of a detachable chamber or unit..

generating plant shown partly in sec'- l shows aneiilarged front elev-a- Figure 7 shows a ,left handy side view of Figure 8 is a 67 andL `Figure 9 indicates an enlarged fragmentary portion of Figure 4.-

v Referring to Figure 1, a partial longitudinal section of a steam generator is indicated in its entirety by the letter A, with the furnace 20, combustion chamber 21, tubes 22,- ash pit 23, and the rear wall 25. A smoke stack 3 0 is connected to an opening in `the wall 25, by meansy of the gas conduit 31.

. y\ Y topi,v plan view of Figure The air `heater is indicated in entirety by the letter B, and its-upper end *fisiconneted to the conduit 31, x

4'5, which are connected by the angle-iron thereto the angle irons and 51 which, with.

' the frame 40, provide an opening 53 and "heater B. A clfa means for connecting the blower E to the nnel iron vis connected to the vframe 45. Angle irons and 61 are connected to'the casmg of the heater B and which, with the channel iron 55, form @an opening 56 and constitutey m'eans for conv necting the air duct C to the' air heater. A plate is connected to the angle irons 50 and 60, by means of the studs 66. Vert-ical angle Irons in the heater B have connectedthereto the side plates 73. An angle I iron is bolted to the frame 40 by meansV angle irons r46 an through the plates 65 and 80.--, Clamping of the bolts 76 and an angle iron 77 is bolted to the frame 45 by means of the bolts 78.

A plate 80 is securedlto the angle irons 75 an i 1 Z bars 85 l (Figure 4)' are positioned with' their webs bearing against the plate 65, and

ositioned with their similar Z barsv 88 are webs bearing against t e plate 80. Each of the Z bars 1s indicated wlth the flanges 90 and 91, and has-formed in its web'elongated' 92. Clamping bolts 93 extend and also through the 70, and. respectively o nin t roug sald' openm bolts 95 connect the angle irons 46 and the flanges 90 of the Z bars.

In the air heater B .are detachably sen cured a row of air chambers or units, each designated in its entirety by the letter G.

Each chamber G'comprises a vertical rear serpentine spacer bar 100, extending the full length of the air chamber, and aA vertical front ierpentine spacer bar 101, with its ends spaced from the to and bottom of "the air chamber. A straig t spacer bar 102 connects the -top ends of the bars 100 and 101, 'and a straight spacer bar 103 connects their lower ends. To the sides-of the spacer bars aredsecured the corrugated plates 106," which constitute the side walls of the air chambers. Between' the lower end ofthe `4bar 101 and the' bar 103, -is formed the and 113.

. sootblower designated'in itsentirety bythe' olpening 108;.-and lbetween, theftop end of t e bar 101 and the bar 102, is formed the o' ning 109. To the outer faces of `the p ates ,106 are secured vthe channel irons 112 penings are formed in the channel irons 112 which register with the openings 108 and 109. The chambers G are supported upon the angle irons 114 of the frame 40. The ystuds 66 engage the bar 101.

In" the top frane 45 are secured( journal brackets 120, for a combined damper and letter H. The combined damper and soot blower comprises the main pipe 125, closed at one end and connected tothe swivel coupling 126 at its other end, by means of the pipe flanges 127. The coupling 126 has connected thereto 'the pipe 130 for-steam.-

A plurality of branch 'pipes 133, closed at G for the purpose of cleanini 4their outer ends, extend from' the pipe 125 and have extending therefrom the outlet nozzles 134, by means of which jets of steam or other cleaning fluid can be directed b`etween the outer faces yof the air chambers or other fore1gn matter. secured to the branch pipes 133 and forms 'a 'damper for the gas conduit 31 andthe air heater B. To one of the pipe flanges y1.27 is fastened the counterwei ht arm 140 with the counter weight 141 `ad]`ustably connectedthereto, y

A vbracket 145 havin the lock pin 146, extends from one of t e sides of the air heater B. A control rod 147 has its upper end pinned to the arm 140, and in its 'lower end are formed notches 150 and 151, by means ofwhich the, rodcan be'locked in different positions to the lock pin 146, to

'I0 f i them of soot plate 136 is locate the combined damper and soot blower H in different positions.

v The operation ofv lthe invention is appaient from the foregoing description and drawings, and may be stated as follows:

When getting up steam in the furnace 20,

the soot blower and damper is swu downto closeoli' the air heater B, to a low the products 4offcombustion from the steam generator A to pass through the' conchambersG, the hot gases and products of combustion. from'the furnace 2O flow down through the air heater B, through thefcorrugated passages between the air chambers,

and transmit heat to the air flowingthrough .the chambers. v f f If the stack 30 is p 'of considerable height sufficient draft will be-realized so that the Y dam-per `33 maybe swung toits vhorizontal position, and the products of combustion which yare discharged fromv the air fheater' B to the conduit D will pass directly to the `base `of the stack. In case of a low stack furnishing insufficient draft, the induced draft fan F will draw the gasesaup throughthe fan and-then force them throu h rtheC stack 30,I after, having -flrst swung lt e damper 3 3 down, to 'close olf passage of the gases to the bottom of said stack. V'

, A If ,the spaces between the air jchambers G are to be'cleaned, the soot blower and damper H is--swungsdown t-o axhorizontal position, and steam supplied bythe-pipe 1s ldischarged from the'nozzles and dip' rected tothe between the outer faces of the corrugated plates 106 of -the l air chambers G.

Z bars bearing against the channel irons 112 and 113 of'the air chambers at the ends. of

lil

the rowthereof. ThefZ bars are clamped in place by means of the bolts 93. Any ofy -the air chambers G can easily be removed from the casing of the air heater B, by releasing the nuts from the studs 66, the nuts of the front members of the frames 40 and and removing the plate 80, after` disengaging the bolts 76 and 78, respectively, from the frames 40 and 45.

An important feature of my present in-` vention consists in the construction and mounting of the row` of air chambers or units G' which, as hereinbefore describedare detachably mounted in, and independently removable from, the casing B, with nari row `passages for a. heating agent between.

casing,

thereof.;

them, so that one or more, or all of the air chambers. G can be removed, either for repairs or to enable a new chamber to be substituted for `anold one, or to enable any or all of said chambers to be, reversed, or turned upside down.

Various modifications may invention, within the s irit, of the claims, and the present exemp ilication is to'- be taken as illustrative and not limitative l claim: A Y,

1. In an air..heater the combination of a a pair of adjustable bars at each of the sldes of the casing, a plurality of air chambers arranged in a row in the casing with the ends of said row bearing against corru ated walls for each of\the chambers, each o? said chambers having an opening at its upper end and an opening at its lower end and mean's' to clamp the Vadjustable bars to the casing and to bear against said chambers at the ends of the of each chamber, each vfront .element having row to clamp the chambers in place in spaced position.- l

A2. In an a1r heater theV combination of a casing, Va pair of adjustable bars at each .of the sides of the casing, a. plurality of air chambers arranged in a row in the casing, corrugated Walls for each chamber, an?

element encasing thevfront and rear portion apair of openings, movablebars at the sides of the casing, and means to clamp the bars to the'asing and to bear against said 'chambers at the 'ends ofthe row to clamp them in place with said elements bearing against each other.

3. In an'air heater the combination of a casing; a pair of adjustable bars lat each of the sides ofthe casing, a plurality of `air near their ends,

chambers arranged in a row in the casin corrugated side walls spaced apart for eac chamber, channel Irons encasin the front kand rcarportion of each cham er, oney of said channel irons having a pair of openings .leading into its chamber, movable bars at the si es of the casing and means to clamp the bars; to. the casing and to bear a ainst said channel irons at the ends of sai the channel irons of each chamber having a pair of openings leading to its interior, the

adjoining faces of said channel irons of adjacent chambers normally bearing 'a ainst eachother, adjustable Z bars at the si es of the casing with one ofthe anges ofeach norlnallybearing against the channel irons of the air chambers of theends of the row, angle irons at the sides and corners of the casing with one of the fian'ges of eachy adjacent to the other flanges ofithe Z bars, and clamping bolts connecting the latter flan es of the Z bars and the adjacent flanges of e angle irons at the corners of the casing.

5.l An air heatero the class descrlbed,

comprising a casing, a'plurality of inde pendently removable air chambers inv said casing,channel irons holding the air cham- .bersm spaced relationship,' said channel irons having openings communicating Vwith the air chambers near opposed ends thereof,

means for' clamping the edges of the channel' irons together, and means for 'connecting the channel irons with air ducts, to enable air to be conducted through said air chambers.`

6. In an air heater of the class described, a casing, a plurality of air chambers detachably secured within said-cas1ng 1n a manner so that one' or all ofsaid chambers may bel removed or reversed upside down, and

means for clamping said chambers together.

in spaced position.` r

7. In an air heater, a casing,'a,plurality of removable closed air chambers enclosed in said casing, openings being provided into the air chambers connectingwith air rlucts he air chambersv being spaced apart by channel ironsof. greater width thanthe chambers for thepassagev of yhot gases between the chambers, means for clamping the edges of the channel 4irons together by bars adjustably attached to 'the angles forming part of the casing, and means for tyingthe adjustable bars to the edges of the chambers andvcasing.

. 8. In an air'heater of the class described, a casing, a plurality of detachable air'cham- .-'bers spaced apart Pfor the passage of'hot rowy to clamp the chambers in place with pasllll l t gases between them, lenlosed in and secred bers having means at each end of the airto said casmg, the. au' chambers havlng.Y inlet and air-outlet openings ,for lsecuring `10 y openin s through channel bars 1n their them'to air ducts to enable air to enter or edges, or air to enter and leave, near their leave the air chambers. upper and lower ends, the top, bottom and In testimony vhereof, I have axed my hack edges of said cham-bers being closed, signature. n i A also the edges adjoining or between the aix- A v e inlet and nir-outlet openings, the nir cham- CHARLES D. MOSHER 

